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Pancreatic cancer rates have increased by nearly a fifth since 1999. 自1999年以来，胰腺癌的发病率已增加近五分之一。 Smoking is a known cause of this often-fatal disease yet the number of smokers has reached a record low while pancreatic cancer rates continue to climb. Could the obesity epidemic now be fuelling the increase in pancreatic cancer rates? How does it do this? 众所周知，吸烟是这种常见致命疾病的诱因之一，但现而今，吸烟人数已达历史最低，而胰腺癌的发病率仍在继续攀升。肥胖症是否也在助推胰腺癌发病率的上升？它又是如何做到的？ Obesity causes inflammation, which encourages cell growth and can promote cancer cell mutations. Unsurprisingly, people who have a BMI over 30 before the age of 50 are at a 25% greater risk of dying of pancreatic cancer. 肥胖会引发炎症，从而促进细胞生长、加快癌细胞突变。果不其然，50岁以前身体质量指数超过30的人因胰腺癌而亡的风险会增加25%。 "We've been puzzled by that increase because smoking - a major risk factor for pancreatic cancer - is declining," Dr Eric Jacobs, scientific director at the American Cancer Society, and co-author of the new study has said. "我们一直对胰腺癌发病率上升一事感到困惑，因为吸烟--胰腺癌的主要危险因素--正在下降，"美国癌症协会的科学主任兼本项新研究的合著者埃里克·雅各布（Eric Jacobs）博士说道。 | 
